530.66=3.14*r*2

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Solution for 530.66=3.14*r*2 equation:


Simplifying
530.66 = 3.14r * 2

Reorder the terms for easier multiplication:
530.66 = 3.14 * 2r

Multiply 3.14 * 2
530.66 = 6.28r

Solving
530.66 = 6.28r

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-6.28r' to each side of the equation.
530.66 + -6.28r = 6.28r + -6.28r

Combine like terms: 6.28r + -6.28r = 0.00
530.66 + -6.28r = 0.00

Add '-530.66' to each side of the equation.
530.66 + -530.66 + -6.28r = 0.00 + -530.66

Combine like terms: 530.66 + -530.66 = 0.00
0.00 + -6.28r = 0.00 + -530.66
-6.28r = 0.00 + -530.66

Combine like terms: 0.00 + -530.66 = -530.66
-6.28r = -530.66

Divide each side by '-6.28'.
r = 84.5

Simplifying
r = 84.5

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